It appears there continues to be confusion over the application and effect of the California Air Resources Board TRU regulations.  The regulations became effective Dec. 10, 2004, and employ a phased in approach to reduction of diesel particulate matter from transport refrigeration units.  The phase in feature requires that a refrigeration unit meets the Low Emission Performance Standard 7 years from its model year.  Actual enforcement of the regulations did not begin until Jan. 1, 2010, when refrigeration units manufactured prior to 2003 were required to meet the Low Emission Performance Standard.

Ken Gilliland

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Transportation

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